2021/09/30 (Thursday)

Status	Run 74 finished. Warming up.
	All mixture is in dump. Fridge isolated. 1K Pot isolated. LN2 Trap 2 still has contaminants in it. He and LN2 in IVC, cryostat vacuum jacket (CVJ) turbo-pumping overnight
0900	MC(Cernox) = 269.5 K, rising 0.338 K/hr. Implies tau_warming = 75.9 hours. Predicted to reach dew point 7 C in 40.7 hours = Saturday @ 2:00 pm. maybe I started pumping the CVJ too soon.
1230	Let 12 mbar N2 gas into vacuum manifold. Then open cryostat vacuum jacket valve to let this into the vacuum jacket. Vacuum Jacket → 0.34 mbar.
1730	MC(Cernox) = 273.55 K, rising 0.775 K/hr. Implies tau_warming = 31.7 hours. Predicted to reach dew point 7 C in 9.9 hours = before 4am tomorrow morning If I pump the CVJ out now it will probably take 24 hours to warm up. So I'll leave it in so that we can drop the MB any time tomorrow. Guilia will start pumping out the CVJ in the morning, we can pump until we decide to drop the MB.